I think when i was very young like 8 years old or something 😊

Way later than everybody else here by the looks of things LOL. Roughly Mid twenties, which was close to a decade ago.

For me it was when I was probably 10 years old and there were a couple of girls in the neighborhood who were a bit older but bigger. I remember playing a game in the yard that involved a piggyback. I remember getting a piggyback ride from one of these girls and immediately I liked that feeling. There was definitely a sense of arousal, tingly feeling.

Id say at around 19 because I experienced it at that age.

Could you please elaborate on your experience ?

Sure,
My girlfriend at that time weighed 145 lbs at 5'7. I was around 5'10 and 130. What happened was I was just standing on a chair to change a bulb and she came, she faced me and hugged me and just lifted me. I suddenly had fireworks in my mind, and a surprise erection.

I started liking it in high school from watching cheerleaders

Waaay back I came across a site called "Big Rags" that focused mainly on Amazon women that towered over other women which which was my primary interest at the time.

I ordered a few videos (which were sent in physical mail) that had a few clips of women carrying and dominating other women, needless to say my search for more and more started there lol.

They went under a few years ago, but here's a snapshot of the old store.

https://web.archive.org/web/20040818...2/merchant.mvc

At the age of 12. I liked to watched women wrestling in wwe and tna.

Wwe
 

I was getting into it a lot watching WWE as a child. At around 7 or 8.